const mongoose = require('mongoose');
// module.exports = new Promise((resolve,reject)=>{
//     mongoose.connect('mongodb://localhost:27017/ssf',{useNewUrlParser:true,useUnifiedTopology:true});
//     mongoose.connection.once('open',err=>{
//         if(!err)console.log('数据库连接成功');
//         else console.log(err);
//     })
// })

module.exports = new Promise((resolve,reject)=>{
    mongoose.connect('mongodb://localhost:27017/ssf',{useNewUrlParser:true,useUnifiedTopology:true,useCreateIndex:true});
        mongoose.connection.once('open',err=>{
        if(!err){
            console.log('数据库连接成功');
            resolve();
        }else{
            console.log(err);
            reject(err);
        }})
        

})